package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     *
     * @param orders
     */
    @Override
    public void submit(Orders orders) {

        //A. 获得当前用户id, 查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();


        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper);
        if (shoppingCartList != null&& shoppingCartList.size() == 0){
            throw new CustomException("购物车为空, 不能下单");
        }
        //B. 根据当前登录用户id, 查询用户数据
        User user = userService.getById(userId);

        //设置总价格.默认值
        BigDecimal amount = new BigDecimal(0);
        //C. 根据地址ID, 查询地址数据

        long orderId = IdWorker.getId();
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook==null){
            throw new CustomException("用户地址信息有误，不能下单");
        }
        //D. 组装订单明细数据, 批量保存订单明细
        ArrayList<OrderDetail> list = new ArrayList<>();
        for (ShoppingCart shoppingCart : shoppingCartList) {

            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            BeanUtils.copyProperties(shoppingCart,orderDetail);
            list.add(orderDetail);
            amount.add(shoppingCart.getAmount().multiply(new BigDecimal(shoppingCart.getNumber())));
        }

        //E. 组装订单数据, 批量保存订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(amount);//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" :
                addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(list);

         //F. 删除当前用户的购物车列表数据
        shoppingCartService.remove(queryWrapper);
    }
}